NCERT Solution for Class 10 Science Chapter 12
Electricity
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Exercises Questions
Page No-221
Questions No-10
How many 176 ohm resistors (in parallel) are required to carry 5 A on a 220 V line?
Share
Let the total number of resistors be x.
Given that: Current I = 5 A and Potential Difference V = 220 V
According to OhmтАЩs law, V = IR
тЯ╣ЁЭСЕ=ЁЭСЙ/ЁЭР╝=220/5=44 ╬й
Now for x number of resistors of resistance 176 ╬й, the equivalent resistance of the resistors connected in parallel is 44 ╬й.
1/44= 1/176 +1/176 +1/176 + 1/176 +..ЁЭСбЁЭСЬ ЁЭСе ЁЭСбЁЭСЦЁЭСЪЁЭСТЁЭСа тЯ╣ 1/44=ЁЭСе/176 тЯ╣ЁЭСе=176/44=4
Therefore, 4 resistors of 176 ╬й are required to draw the given amount of current.
For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-12/